Ryuuta Yagi

Last Updated :2020/09/01

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Associate Professor
Web Site
E-mail
yagihiroshima-u.ac.jp
Other Contact Details
1-3-1,Kagamiyama,Higashi-Hiroshima, Japan
TEL : (+81)82-424-7041 FAX : (+81)
Self-introduction
My research interest is nano physics and technology. We are currently studying graphene and topological insulators using nano fabrication technique.

Basic Information

Major Professional Backgrounds

  • 1993/04/01, 1999/05/31, The University of Tokyo, Research Associate
  • 1999/06/01, 2000/05/31, Japan Science and Technology Agency, Postdoctoral Fellow
  • 2000/06/01, 2002/03/31, Hiroshima University, Cryogenic Center, Associate Professor
  • 2002/04/01, Hiroshima University, Graduate School of Advanced Sciences of Matter , Associate Professor
  • 2007/04/01, AdSM, Hiroshima University, Associate Professor

Educational Backgrounds

  • The University of Tokyo, Faculty of Liberal Arts, Department of Pure and Applied Science, Japan, 1984/04, 1988/03
  • The University of Tokyo, Graduate School of Pure and Applied Sciences, Japan, 1988/04, 1990/03
  • The University of Tokyo, Graduate School, Division of Science, Japan, 1990/04, 1993/03

Academic Degrees

  • Doctor of Science, The University of Tokyo
  • Master of Science, The University of Tokyo

Educational Activity

  • 【Bachelor Degree Program】School of Science : Physics
  • 【Master's Program】Graduate School of Advanced Sciences of Matter : Quantum Matter
  • 【Doctoral Program】Graduate School of Advanced Sciences of Matter : Quantum Matter

In Charge of Primary Major Programs

  • Physics

Research Fields

  • Interdisciplinary science and engineering;Nano / Micro science;Nanostructural physics

Research Keywords

  • Graphene, Topological Insulator, Nano Science, Mesoscopic system

Affiliated Academic Societies

  • APS

Educational Activity

Course in Charge

  1. 2020, Undergraduate Education, First Semester, MechanicsA
  2. 2020, Undergraduate Education, Second Semester, Exercises in Statistical Mechanics
  3. 2020, Undergraduate Education, First Semester, Special Study for Graduation A
  4. 2020, Undergraduate Education, Second Semester, Special Study for Graduation B
  5. 2020, Graduate Education (Master's Program) , First Semester, Seminar on Sciences of Matter
  6. 2020, Graduate Education (Master's Program) , Second Semester, Seminar on Sciences of Matter
  7. 2020, Graduate Education (Master's Program) , 1Term, Exercises in Basic Sciences of Matter A
  8. 2020, Graduate Education (Master's Program) , First Semester, Seminar on Basic Sciences of Matter A
  9. 2020, Graduate Education (Master's Program) , Second Semester, Seminar on Basic Sciences of Matter B
  10. 2020, Graduate Education (Master's Program) , Academic Year, Academic Presentation in Basic Sciences of Matter
  11. 2020, Graduate Education (Doctoral Program) , Academic Year, Advanced Study in Quantum Matter
  12. 2020, Graduate Education (Master's Program) , 2Term, Exercises in Basic Sciences of Matter A
  13. 2020, Graduate Education (Master's Program) , 3Term, Exercises in Basic Sciences of Matter B
  14. 2020, Graduate Education (Master's Program) , 4Term, Exercises in Basic Sciences of Matter B
  15. 2020, Graduate Education (Master's Program) , 3Term, Low Temperature Physics B
  16. 2020, Graduate Education (Master's Program) , Academic Year, Advanced Study in Quantum Matter

Research Activities

Academic Papers

  1. Ballistic transport experiment detects Fermi surface anisotropy of graphene, PHYSICAL REVIEW B, 99(3), 20190129
  2. Low-energy band structure in Bernal stacked six-layer graphene: Landau fan diagram and resistance ridge, PHYSICAL REVIEW B, 99(8), 20190206
  3. Low-energy band structure and even-odd layer number effect in AB-stacked multilayer graphene, Sci. Rep., 8, 13018, 20180826
  4. Magnetoresistance measurements of tetralayer graphene device with single gate electrode, J. Phys. Conf. Ser., 969, 012150, 201804
  5. Multilayer graphene shows intrinsic resistance peaks in the carrier density dependence, Sci. Rep., 8, 13992, 2018
  6. Electronic Transport of Graphene Subjected to Periodic Structure Modulation, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 84(12), 20151215
  7. Ballistic transport in graphene antidot lattices, Phys. Rev. B, 92, 195406, 2015
  8. Observing Altshuler-Aronov-Spivak Oscillation in a Hexagonal Antidot Array of Monolayer Graphene, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 81(6), 201206
  9. Graphene Made by Mechanical Exfoliation of Graphite Intercalation Compound, JAPANESE JOURNAL OF APPLIED PHYSICS, 51(8), 201208
  10. Charge Imbalance Relaxation Due to Pair Breaking Perturbation by magnetic field, J. Phys. Soc. Jpn, 79, 13784, 20100301
  11. Effect of magnetic field on charge imbalance relaxation of Non-Equilibrium superconductivity, Physica C, 470, 877, 20101101
  12. Magnetoresistance oscillation at charge neutrality point in monolayer graphene due to potential fluctuation, J. of Phys. Conf. Ser., 232, 012013, 20100701
  13. Negtive magnetoresistance due to charge fluctuation in mono-layer graphene in magnetic field, Physica E, 42, 673, 20100201
  14. Charge Imbalance Relaxation Due to Pair Breaking Perturbation by Magnetic Field, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 79(1), 201001
  15. Negative magnetoresistance due to charge fluctuation in mono-layer graphene at the minimum conductivity point, PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 42(4), 673-676, 201002
  16. Effect of magnetic field on charge imbalance relaxation of non-equilibrium superconductivity, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 470, S877-S878, 201012
  17. Study of Quasi-Particle Recombination Rate by Injection Experiment Using Narrow Superconducting Wire and DC-SQUID Junctions, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 78(5), 200905
  18. Observation of Charge Imbalance in Voltage-Biased Superconductor-Insulator-Normal Tunnel Junctions, Phys. Rev. B, 73, 134507, 20060401
  19. Control of Profile of Josephson Junction by Quasi-Particle Injection, Physica B, 383, 53, 20060401
  20. Observation of Non-Equilibrium Superconductivity using DC-SQUID, Physica B, 383, 55, 20060401
  21. Fabrication of Cr/CrOx/Cr SET Transistors, Physica B, 383, 57, 20060401
  22. Spatial Decay of Nonequilibrium Quasi^particles in Narrow Superconducting Wires with Injection, AIP Conf. Proc., 850, 1419, 20060401
  23. Fabrication of Cr/CrOx/Cr SET Transistors, AIP Conf. Proc., 850, 751, 20060401
  24. Charge imbalance observed in voltage-biased superconductor-normal tunnel junctions, PHYSICAL REVIEW B, 73(13), 200604
  25. Effect of quasi-particle injection on retrapping current of Josephson junction, PHYSICA B-CONDENSED MATTER, 383(1), 53-54, 20060815
  26. Observation of non-equilibrium superconductivity using DC-SQUID junctions, PHYSICA B-CONDENSED MATTER, 383(1), 55-56, 20060815
  27. All-chromium single electron transistor fabricated with plasma oxidation, PHYSICA B-CONDENSED MATTER, 383(1), 57-58, 20060815
  28. Bias dependence of charge imbalance effect in superconducting narrow wires with superconductor/insulator/normal junctions, Physica E, 22, 2004, 20040401
  29. Bias voltage dependence of charge imbalance effect in lateral superconductor/insulator/normal junctions, PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 22(1-3), 757-760, 200404
  30. Quasi-Particle Transport in Narrow Superconducting Wires with Superconductor/Insulator/Normal Tunnel Junctions, Superlattices and Microstructures, 34, 263, 20030401
  31. Quasi-particle transport in narrow superconducting wires with superconductor/insulator/normal tunnel junctions, SUPERLATTICES AND MICROSTRUCTURES, 34(3-6), 263-269, 2003
  32. Phase diagram for two-dimensional arrays of small Josephson junctions with shunt resistors, PHYSICA C, 352(1-4), 181-185, 200104
  33. Superconductor-insulator transition in a two-dimensional array of resistively shunted small Josephson junctions, 85(9), 1974-1977, 20000801
  34. Superconductor-Insulator Transition in Single Small Josephson Junction with Normal Tunneling Junction and with Ohmic Shunt Resistor, Physica B, B280, 416-417, 20000901
  35. Superconductor-Insulator Transition in a Two-Dimensional Array of Resistively Shunted Small Josephson Junctions, Phys. Rev. Lett., 85, 1974, 20000401
  36. Dissipative Phase Transition in Single Small Josephson Junction with Normal Tunneling Junction, J. Phys. Soc. Jpn., 68(4), 1075-1077, 19990401
  37. The Effect of Shunt Resistor on Superconductor-Insulator Transition in Single Small Josephson Junctions, Solid State Electronics, 42(7-8), 1477-1480, 19980701
  38. Two-Dimensional Arrays of Small Josephson Junctions with Regular and Random Defects, J. Phys. Soc. Jpn., 67(4), 729-731, 19980301
  39. Tuning of Superconductor-Insulator Transition in Single Small Josephson Junctions with Shunt Resistor, J. Phys. Soc. Jpn., 66(11), 3360-3362, 19971101
  40. Phase Diagram for Superconductor-Insulator Transition in Single Small Josephson Junction with Shunt Resisto, J. Phys. Soc. Jpn., 66(12), 3722-3724, 19971201
  41. Chemical Potential Dependence of Resistance of Two-Dimensional Array of Small Tunnel Junctions, J. Phys. Soc. Jpn., 66(1), 226-227, 19970101
  42. Study on Superconductor-Insulator Transition in Two-Dimensional Arrays of Small Josephson Junctions, J. Phys. Soc. Jpn., 66(8), 2429-2436, 19970801
  43. Superconductor-Insulator Transition in Two-Dimensional Network of Josephson Junctions, J. Phys. Soc. Jpn., 65(1), 36-38, 19960101
  44. Meausrement of Self Capacitance via Single Electron Tunneling Transisto, J. Phys. Soc. Jpn., 65(3), 868-869, 19960301
  45. Capacitance Dependence of Critical Tunneling Resistance for Superconductor-Insulator Transition in Two-Dimensional Network of Josephson Junctio, Physica, B227, 19960501
  46. Effect of Finite System Width in Two-Dimensional Network of Small Tunnel Junctions, Czech. J. Phys., 46(S2), 695-696, 19960801
  47. Phase Diagram for Superconductor-Insulator Transitons in Two-Dimensional Network of Small Tunnel Junctio, Czech. J. Phys., 46(S2), 693-694, 19960801
  48. Edge Effect in Two-Dimensional Network of Small Josephson Junctions, J. Phys. Soc. Jpn., 65(8), 2365-2366, 19960801
  49. Charge-Vortex Duality Breaking in Small Tunnel Junction with Finite Width, J. Phys. Soc. Jpn., 375-377, 19950201
  50. Spectroscopy of a Single Superconducting Fine Particle using a Scanning Tunneling Microscope, J. Phys. Soc. Jpn., 64(4), 1059-1062, 19950401
  51. Breakdown of Charge-Vortex Duality in Small Tunnel Junction Arrays with Finite Width, Jpn. J. Appl. Phys., 34(8B), 4569-4571, 19950801
  52. The Origin of Anomalous Angular Dependent Magnetoresistance Oscillation Effect in a-(BEDT-TTF)2KHg(SCN)4, J. Phys. Soc. Jpn., 63(2), 674-484, 19940201
  53. Effect of Pressure on the Magnetoresistance of CeInCu2, J. Alloy. Compd., 207-208, 271-274, 19940101
  54. On the Peak Inversion of The Angular Dependent Magnetoresistance Oscillation of Cylindrical Fermi Surfaces with Different Corrugation Symmetries, Solid State Commun., 89(3), 275-281, 19940301
  55. Study of the Angular Dependent Magnetoresistance Oscillations in a-(BEDT-TTF)2M(SCN)4 [M:K, NH4], Physica, B201, 474-478, 19940201
  56. Magnetotransport studies of Topology of Fermi Surface of the Quasi Two-Dimensional Organic Conductors (BEDT-TTF)2KHg(SCN)4 , the Isostructural Metal (BEDT-TTF)2(NH4)Hg(SCN)4 and the Quasi One-Dimensional Superconductor (TMTSF)2ClO4, JJAP series, 7(1), 381-389, 19920601
  57. Pressure-Induced Positive Magnetoresistance in the Heavy Fermion Compound CeInCu2, J. Phys. Soc. Jpn., 61(8), 2632-2635, 19920801
  58. Fermiology and unusual high-field magnetotransport in novel organicmetals (BEDT-TTF)2XHg(SCN)4 (X=K,NH4), Synth. Met., 41-3, 2171-2174, 19910801
  59. Angular Dependent Magnetoresistance Oscillation in GaAs/AlxGa1-xAs Superlattice, J. Phys. Soc. Jpn., 60(11), 3784-3791, 19910801
  60. Semiclassical Interpretation of Angular Dependent Oscillatory Magnetoresistance in Quasi-Two-Dimensional Systems, J. Phys. Soc. Jpn., 59(9), 3069-3072, 1990
  61. High-field Magnetotransport and Fermi-Surface Topology in the Novel Quasi-Two-Dimensional Organic Conductor bis(ethylenedithiolo)tetrathiafulvalenium mercuric potassium thiocyanate, (BEDT-TTF)2KHg(SCN)4, Phys. Rev., B41(8), 5428-5431, 19900301
  62. Quantum Oscillations of Magnetoresistance in a New Organic Superconductor (BEDT-TTF)2(NH4 )Hg(SCN)4, Solid State Commun., 75, 901-905, 19901101
  63. Observing Altshuler-Aronov-Spivak Oscillation in a Hexagonal Antidot Array of Monolayer Graphene, J. Phys. Soc. Jpn., 81, 063707, 2012
  64. Electric Transport of Graphene Subjected to Modulated Structures, J. Phys. Soc. Jpn, 84, 212008 1-212008 9, 2015
  65. Magnetoresistance measurements of tetralayer graphene device with single gate electrode,, J. Phys. Conf. Ser., 969, 012150, 20180419
  66. Multilayer graphene shows intrinsic resistance peaks in the carrier density dependence, SCIENTIFIC REPORTS, 8, SEP 18 2018
  67. Low-energy band structure and even-odd layer number effect in AB-stacked multilayer graphene, SCIENTIFIC REPORTS, 8, 20180829

Publications such as books

  1. 1990/08, The Physics and Chemistry of Organic Superconductors , Springer Verlag publishing, 1990, 08
  2. 2009/07, Graphene:Functions and Applications, graphene, 2009, 7, 978-4-7813-0146-4

Invited Lecture, Oral Presentation, Poster Presentation

  1. Low-energy band structure and even-odd layer number effect in AB-stacked multilayer graphene: evolution of Landau fan diagrams from 1 to 7 layers, Ryuta Yagi, Taiki Hirahara, Ryoya Ebisuoka, Tomoaki Nakasuga, Shingo Tajima, Kenji Watanabe, Takashi Taniguchi, Takashi Taniguchi , APS March meeting, March 4-8, 2019, Boston, Massachusetts, USA., 2019/03/04, Without Invitation, American Physical Socienty, Boston, MA, USA
  2. Multilayer graphene shows intrinsic resistance peaks in the carrier density dependence: experiments in tetra- and hexlayer graphene, Ryuta Yagi, Taiki Hirahara, Ryoya Ebisuoka, Takushi Oka, Shingo Tajima , Kenji Watanabe, Takashi Taniguchi, APS March meeting, March 4-8, 2019, Boston, Massachusetts, USA., 2019/03/04, Without Invitation, American Physical Socienty, Boston, MA, USA
  3. Fermi surface anisotropy of graphene measured by ballistic transport experiments on antidot lattice samples, Ryuta Yagi, Takushi Oka, Ryoya Ebisuoka, Taiki Hirahara, Kenji Watanabe, Takashi Taniguchi, APS March meetin, 2019/03/04, Without Invitation, American Physical Socienty, Boston, MA, USA
  4. Observing evolution of low-energy band structure in Bernal stacked multilayer graphene: from 1 to 7 layers, Ryuta Yagi, Taiki Hirahara, Ryoya Ebisuoka, Ryoya, Takushi Oka, Shingo Tajima, Kenji Watanabe, Takashi Taniguchi, 19th International Conference on the Science and Application of Nanotubes and Low-dimensional Materials ( NT18), 2018/07/15, Without Invitation, Beijing China
  5. Observation of Band structure effect in carrier density dependence of dual-gated 4-layer graphene sample at zero magnetic field, Hirahara, Taiki; Ebisuoka, Ryoya; Oka, Takushi; Nakasuga, Tomoaki; Tajima, Shingo; Watanabe, Kenji; Taniguchi, Takashi; Yagi, Ryuta, 19th International Conference on the Science and Application of Nanotubes and Low-dimensional Materials ( NT18), 2018/07/15, Without Invitation, Beijing, China
  6. On low field magneto-resistance oscillations in moiré superlattices of bilayer graphene/h-BN, Ebisuoka, T. Hirahara, K. Watanabe, T. Taniguchi, and R. Yagi, 28 th International Conference of Low Temperature Physics,, 2017/08/09, Without Invitation, Goetegorg, Sweden
  7. Landau level structure of Bernal-stacked tetra-layer graphene, T. Hirahara, R. Ebisuoka, K. Watanabe, T. Taniguchi, and R. Yagi, 28 th International Conference of Low Temperature Physics, 2017/08/09, Without Invitation, Goetegorg, Sweden
  8. On low field magneto-resistance oscillations in moiré superlattices of bilayer graphene/h-BN, Ebisuoka, T. Hirahara, K. Watanabe, T. Taniguchi, and R. Yagi,, 28 th International Conference of Low Temperature Physics, 2017/08/09, Without Invitation, Goeteborg, Sweden
  9. Ballistic transport in graphene antidot lattices, R. Yagi, R. Sakakibara, R. Ebisuoka, J. Onishi, K. Watanabe, T. Taniguchi and Y. Iye, Americal Physical Society March meeting, Without Invitation, American Physical Socieity, Baltimore, USA
  10. Ballistic and phase coherent transport in high-mobility graphene antidot lattices made on h-BN, Ryuta Yagi, Ryoji Sakakibara, Ryoya Ebisuoka, Jumpei Onishi, Kenji Watanabe, Takashi Taniguchi2, and Yasuhiro Iye, Graphene Malaysia, 2016/11/08, Without Invitation, Kuala Lumpur, Malaysia
  11. Commensurability magnetoresistance due to ballistic transport in highmobility graphene antidot lattices made on h-BN, R. Yagi, R. Sakakibara, R. Ebisuoka, J. Onishi, K. Watanabe, T. Taniguchi and Y. Iye, 33rd International Conference on the Physics of Semiconductors, 2016/07/31, Without Invitation, Beijing, China
  12. Brillouin zone folding and anisotropic ban structure in more superlattices in bilayer graphene/h-BN heterostructur, R. Ebisuoka, S. Uchino, T. Hirahara, J. Onishi, K. Watanabe, T. Taniguchi and R. Yagi, The 22nd International Conference on High Magnetic Fields in Semiconductor Physics, 2016/07/25, Without Invitation, Sapporo, Japan
  13. Magneto-transport of high-mobility graphene antidot lattices made on h-BN – ballistic and phase coherent transport, R. Yagi, R. Sakakibara, R. Ebisuoka, J. Onishi, K. Watanabe, T. Taniguchi and Y. Iye., The 22nd International Conference on High Magnetic Fields in Semiconductor Physics, 2016/07/25, Without Invitation
  14. Magnetotransport study of electronic band structure in tetralayer graphene using high-mobility graphene fabricated on h-BN, T. Hirahara, S. Uchino, R. Ebisuoka, J. Onishi, K. Watanabe T. Taniguchi and R. Yagi, The 22nd International Conference on High Magnetic Fields in Semiconductor Physics, 2016/07/25, With Invitation, Sappro, Japan
  15. Quantum Correction to Conductance in Graphene Antidot Lattices, R. Yagi, R. Yagi, R, Sakakibara, and R. Ebisuoka, 21st International Conference on Electronic Properties of Two-Dimensional Systems, Sendai, Japan, 2015/07/26, Without Invitation, Sendai, Japan
  16. Graphene made by exfoliation of graphite intercalation compound, R. Yagi, M. Shimomura, and S. Fukada, The Sixteenth International Conference on the Science and Application of Nanotubes, 2015/06/28, Without Invitation, Nagoya, Japan
  17. Graphene made by exfoliation of graphite intercalation compound, R. Yagi, R. Yagi, M. Shimomura, and S. Fukada, The Sixteenth International Conference on the Science and Application of Nanotube, 2015/06/28, Without Invitation, Nagoya, Japan
  18. Altshuler-Aonov-pivak oscillation in graphene antidot lattice, R. Yagi, S. Sakakibara, J. Onishi, R. Ebisuoka, APS March Meeting 2015, 2015/03/04, Without Invitation, Americal Physical Society, San Antonio, Texas, USA
  19. Fabricating graphene from graphite intercalation compounds, R. Yagi, M. Shimomura, F. Tahara, S. Fukada, Americal Physical Society March meeting, Baltimore,, 2013/03/18, Without Invitation, Baltimore, USA
  20. Magnetic fingerprint of mono-layer graphene, Ryuta Yagi, Seiya Fukada, Yumi Shintani, Recent Advances in Graphene and Related Materials, 2010/08/01, Without Invitation, Singapore
  21. Fluctuation of magnetoresistance at the minimum conductivity point of monolayer graphene due to potential fluctuation, R. Yagi, S. Fukada, Y. Shintani, Americal Physical Society March meeting, 2010/03/15, Without Invitation, American Physical Society, Portland, USA
  22. Magnetotransport of graphene FET, R. Yagi, The 4th International Symposium on Atomic Technology, 2009/11/17, With Invitation
  23. Relaxation of Charge Imbalance in Non-equilibrium Superconductivity Due to Pair Breaking Perturbation by Magnetic Field, K. Tsuboi and R. Yagi,, 9th International Conference on Material and Mechanisms of Superconductivity (M2S-IX), 2009/09/07, Without Invitation, Tokyo, Japan
  24. Negative magnetoresistance due to charge fluctuation in mono-layer graphene at the minimum conductivity point, R. Yagi, S. Fukada, H. Kobara, N. Ogita and M. Udagawa, The 18th international conference on electronic property of two dimensional systems (EP2DS), 2009/07/19, Without Invitation, Kobe, Japan
  25. Energy Distribution of Quasi-Particle Charge Density in Mesoscopic Superconducting Wires, K. Tsuboi, K. Utsunomiya, T. Kubota, Y. Terao, Y. Ikebuchi, R. Yagi, Mesoscopic Superconductivity and Spintronics (MS+S2006), 2007/02/27, Without Invitation, Atsugi, Japan
  26. Physics of small tunnel junctions, R. Yagi, 1st HU-SKKU Workshop on Advanced Materials Research, 2006/11/16, With Invitation, Higashi Hiroshima, Japan
  27. Quasi-Particle Recombination in mesoscopic superconducting wires, K. Utsunomiya, K. Tsuboi, T. Kubota, Y. Terao, Y. Ikebuchi, R. Yagi, Mesoscopic Superconductivity and Spintronics (MS+S2006), 2006/02/27, Without Invitation, Atsugi, Japan
  28. Transport property of Cr/CrOx/Cr Single Electron Transistor fabricated using Plasma Oxidation ,, T. Kubota and R. Yagi, The 3rd Hiroshima Workshop NFM2F, 2005/11/16, Without Invitation, Higashi-Hiroshima, Japan
  29. Observation of Non-Equilibrium Superconductivity Using DC-SQUID, H. Sera, Y. Ikebuchi and R. Yagi, The 3rd Hiroshima Workshop NFM2F, 2005/11/16, Without Invitation, Higashi-Hiroshima, Japan
  30. Quasi-Particle Transport in Narrow superconducting wires with superconductor/insulator/normal tunnel junctions, R. Yagi, Sixth International Conference on New Phenomena in Mesoscopic Structures and Fourth International Conference on Surfaces and Interfaces of Mesoscopic Devices (NPMS-6 ), 2003/12/01, Without Invitation, Hawaii, USA
  31. Non-equilibrium Quasi-Particle Transport in Narrow Superconducting Wires, Y. Ikebuchi and R. Yagi, The 15th International Conference on Electronic Properties of Two-Dimensional Systems (EP2DS), 2003/07/14, Without Invitation, Nara, Japan
  32. Resistance Fluctuation in Narrow Ferromagnetic Wires, S. Sakita and R. Yagi, International Conference on Low Temperature Physics, 2002/08/12, Without Invitation, Hiroshima, Japan
  33. Superconductor-Insulator Transition in Single Small Josephson Junction with Normal Tunneling Junction and Ohmic Shunt Resistor, R. Yagi, S. Kobayashi and Y. Ootuka, 22 th International Conference on Low Temperature Physics (LT22), 1999/84, With Invitation
  34. Superconductor-Insulator Transitions in Single Small Josephson Junction with Normal Tunneling Junction and Ohmic Shunt Resistor, R. Yagi, 22th International Conference on Low Temperature Physics, 1999/08, With Invitation
  35. Dependence on Shunt Resistance and Distance on Single Small Josephson Junctions, R. Yagi, S. Kobayashi and Y. Ootuka, Fourth International Symposium on New phenomena in Mesoscopic Structures, 1998/12/06, With Invitation, Hawaii, USA
  36. Superconductor-Insulator Transition in Single Small Josephson Junction with Shunt Resistor, R. Yagi, S. Kobayashi and Y. Ootuka, International Workshop on Nano-Physics and Electronics, 1997/09/18, Without Invitation, Tokyo, Japan
  37. Superconductor-Insulator Transition in Single Small Josephson Junction with Shunt Resistor, R. Yagi, S. Kobayashi, CMD Condensed Matter Division, Europian Physical Society, 1997/08/18, Without Invitation, Leuven, Belgium
  38. Superconductor-Insulator Transitons in Two-Dimensional Network of Small Tunnel Junctions, R. Yagi, T. Yamaguchi, H. Kazawa and S. Kobayashi, International Conference on Low Temperature Physics (LT21), 1996/08/07, Without Invitation, Prague, Czech
  39. Capacitance Dependence of Critical Tunnelling Resistance for Superconductor-Insulator Transition in Two-Dimensional Network of Josephson Junctions, R. Yagi, T. Yamaguchi, H. Kazawa and S. Kobayashi, Third International Symposium on New phenomena in Mesoscopic Structures, 1995/12/04, Without Invitation, Hawaii, USA
  40. Magnetoresistance in Modulated Structures, Y. Iye, R. Yagi, Y. Hashimoto, and T. Ikoma, Second International Symposium on New phenomena in Mesoscopic Structures, 1992/12/05, Without Invitation, Hawaii, USA
  41. Angular Dependent Magnetoresistance Oscillation in GaAs/AlxGa1-xAs Superlattice, R. Yagi, Y. Iye, Y. Hashimoto, T. Odagiri, H. Noguchi, H. Sakaki and T. Ikoma, Electronic Properties of Two-Dimensional Systems (The 9th international Conference), 1991/07/08, Without Invitation, Nara, Japan
  42. Angular Dependent Oscillatory Magnetoresistance in Quasi-Two-Dimensional Systems, R.Yagi, Y.Iye, T.Osada, and S.Kagoshima, International Conference on Science and Technology of Synthetic Metals (ICSM 90), 1990/09/02, Without Invitation, Tubingen, Germany
  43. Fermiology and unusual high-field magnetotransport in novel organicmetals (BEDT-TTF)2XHg(SCN)4 (X=K,NH4), T. Osada, R. Yagi, A. Kawasumi, S. Kagoshima, N. Miura, M. Oshima, H. Mori, T. Nakamura, and G. Saito, International Conference on Science and Technology of Synthetic Metals (ICSM ‘90), 1990/09/02, Without Invitation, Tubingen, Germany
  44. reakdown of Charge-Vortex Duality in Small Tunnel Junction Arrays with Finite Width, R. Yagi and S. Kobayashi, International Workshop on Mesoscopic Physics and Electronics (MPE 95), Without Invitation, Tokyo, Japan
  45. High Field Magnetotransport in the Organic Conductor (BEDT-TTF)2KHg(SCN)4, T. Osada, R. Yagi, S. Kagoshima, N. Miura, M. Oshima, and G. Saito, Physics and Chemistry of Organic Conductors, I.S.S.P. International Symposium, Without Invitation, Tokyo, Japan

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI, 2013, 2017
  2. KAKENHI, Study of quasi-particle conduction in small non-equilibrium superconductors, 2004, 2005
  3. KAKENHI, 2002, 2003
  4. 小笠原財団研究助成, 金属微小トンネル接合の物理, 2001, 2003
  5. CREST, 微細構造におけるスピン量子物性の開拓, 2000, 2001
  6. KAKENHI, 1999, 1999
  7. KAKENHI, 1998, 1998
  8. KAKENHI, 1997, 1997
  9. KAKENHI, SCANNING SET TRANSISTOR MICROSCOPE, 1997, 1998
  10. 倉田奨励金, 並列微小トンネル接合による電荷の巨視的量子トンネルの研究, 1997, 1999
  11. KAKENHI, 1996, 1996
  12. KAKENHI, 1996, 1997
  13. CREST, 金属微小トンネル接合システム, 1996, 1999
  14. KAKENHI, 1995, 1995
  15. KAKENHI, 1994, 1994

Social Activities

Organizing Academic Conferences, etc.

  1. The 3rd Hiroshima Workshop NFM2F, Organizing committee, 2005/11, 2005/11

Other Social Contributions

  1. オープンキャンパス 講義